Table 2.
Comparison of the concentrations (μg L−1) of some common pesticides in the water of the considered South Asian river systems with those of some standard guidelines.
| Pesticides | Rivers of India |
Rivers of Pakistan |
Standard Guidelines |
||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Brahmaputra River | Chilika Lake | Tapi River | Hoogly River | Indus River | Kabul River | USEPA, AV | WHO, GV | USA, MCL | AUS, HV | NZ, MAV | |
| Aldrin | 0.005 | - | - | 0.009 | - | - | 0.36 | 0.03 | - | 0.03 | - |
| Dieldrin | 0.019 | - | - | 0.007 | - | - | 0.36 | 0.03 | - | 0.03 | - |
| Carbaryl | - | - | - | - | 0.001 | 0.001 | - | - | - | 30.0 | - |
| Carbofuran | - | - | - | - | 0.005 | 0.003 | - | 7.0 | 40 | 10.0 | 8.0 |
| Chlorpyrifos | - | 2.73 | 0.27 | - | 0.007 | 0.009 | 0.083 | - | 2.0 | - | 70.0 |
| ∑Chlordane | - | - | - | - | 0.008 | - | 2.40 | 0.20 | - | 1.0 | - |
| Dichlorvos | - | 0.65 | - | - | - | - | - | - | - | 1.0 | - |
| ∑DDTs | 0.225 | 23.58 | 3.15 | 0.026 | 0.074 | - | 1.10 | 2.0 | - | 20.0 | 2.0 |
| ∑Endosulfan | 0.053 | - | 14.18 | 0.010 | 0.001 | - | 0.22 | - | 0.20 | 30.0 | - |
| Heptachlor | 0.010 | 1.00 | - | 0.026 | 0.014 | - | 0.52 | 0.03 | 0.40 | 0.30 | 0.04 |
| ∑HCHs | 0.022 | 6.60 | - | 0.114 | 0.045 | - | 2.00 | - | 0.20 | 20.0 | 2.0 |
| HCB | - | - | - | - | 0.002 | - | 6.00 | 1.0 | 1.0 | - | 1.0 |
| Methomyl | - | - | - | - | 0.200 | 5.50 | - | - | - | - | - |
N.B.: AV = Acute Value, GV = Guideline Value, MCL = Maximum Contaminant Level, MAV = Maximum Acceptable Value, HV = Health Value. USEPA (United State Environmental Protection Agency) [79, 80], WHO (World Health Organization) [79, 81], USA (United States of America) [79], AUS (Australia) [79, 82], NZ (New Zealand) [79, 83].